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Traction Drill Collar (TDC)

Reduces vibration & creates downhole forward traction

Traction Drill Collar (TDC)


An increased number of deviated and horizontal wells are drilled each year with a corresponding increase in demand to extend the reach of these wells.

The Traction Drill Collar (TDC) meets the challenges that these demands place on the drilling process by:

  • Providing active downhole traction and torque reduction
  • Reducing lateral and axial vibration in the lower drilling assembly
  • Maintain controlled weight on bit
  • Reducing compressive buckling in the lower drill string
  • Generating downhole tension
  • Reducing the risk of Stick-slip through constant motion

Applications

The Traction Drill Collar has been designed as a short collar system that can be easily placed within conventional and rotary steerable drilling assemblies.

The Traction Drill Collar converts 40-60% of the side forces it is subject to into linear traction (forward movement). The six free rotating sleeves also reduce rotational friction, but work as three matched pairs lifting each other off the lowside for enhanced hole cleaning.

In rotation, the speed of this traction is designed to exceed the maximum anticipated ROP, while being optimised to allow the traction sleeves to maintain constant, controlled WOB.

By providing free rotating bearing sleeves in the lower drilling assembly the Traction Drill Collar substantially reduces the Axial, lateral and torsional drilling induced vibration.

As a short collar system, the Traction Drill Collar is compatible with most drilling assemblies, allows common stand heights for racking back on the drill floor and is designed as a plug and play drilling enhancement tool.

The Traction Drill Collar is essentially a short pony drill collar, machined to house the external free rotating sleeves. With a standard ID the tool does not add any additional pressure drop to the BHA.

Features

  • Next Generation of weight transmission technology
  • Skewed rollers help pull upper BHA into tension
  • Converts 40-60% of side force into Traction (forward movement)
  • Combines downhole traction with torque reduction
  • Proprietary mud lubricated elastomeric bearings
  • Standard Pony collar lengths and dimensions
  • Full bore ID
  • One piece low profile sleeves

Benefits

  • Overcomes weight transfer issues, extends lateral reach
  • Downhole traction (tension) reduces string buckling
  • Provides constant WOB and can reduce stick-slip
  • Rotational friction is reduced significantly
  • Robust design, no specialist handling required, Plug & Play
  • Minimum ECD impact

THIS PRODUCT IS STILL IN DEVELOPMENT

We are looking for candidate wells to be drilled with long horizontals to test our Traction Drill Collar (TDC)

Contact us at drilling@paradigm.eu

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